Watch List notes:

NORTHERN ZHOU: Anonymous, 574-576, AE cash (3.31g), H-13.31, wu xing da bu, VF. Wu Xing Da Bu, which literally means "The Large Coin of the Five Elements [metal, wood, water, fire, and earth]", were issued in 574 by Emperor Wu. They were intended to be worth ten Bu Quans. Illegal coining soon produced specimens of a reduced weight and the authorities banned the use of this coin in 576. This inscription is frequently found on amulets.

Estimate: 50-75 USD